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Sun Nov 28 23:17:13 CET 2010 · https://mail.python.org/pipermail/python-dev/2010-November/106075.html

>>>>> float('١٢٣٤.٥٦')
>> 1234.56

I think it's a bug that this works. The definition of the float builtin says

Convert a string or a number to floating point. If the argument is a
string, it must contain a possibly signed decimal or floating point
number, possibly embedded in whitespace. The argument may also be
'[+|-]nan' or '[+|-]inf'.

Now, one may wonder what precisely a "possibly signed floating point
number" is, but most likely, this refers to

floatnumber   ::=  pointfloat | exponentfloat
pointfloat    ::=  [intpart] fraction | intpart "."
exponentfloat ::=  (intpart | pointfloat) exponent
intpart       ::=  digit+
fraction      ::=  "." digit+
exponent      ::=  ("e" | "E") ["+" | "-"] digit+
digit          ::=  "0"..."9"

Regards,
Martin

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